Thanks for your invitation, but I’m so sorry I can’t go. I need to ________ my baby at home.

A．take away

B．take off

C．take care of

D．take out of

有如下程序 main() { int x=1,a=0,b=0; switch(x){ case 0: b++; case 1: a++; case 2: a++;b++; } printf("a=%d，b=%d\n",a,b) ; } 该程序的输出结果是______。

A．a=2,b=1

B．a=1,b=1

C．a=1,b=0

D．a=2,b=2